import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
Vue.use(VueRouter)

const routes = [
  {
    path: '/',
    redirect: '/login'
  },
  {
    path: '/login',
    component: Login
  },
  {
    path: '/home',
    component: Home
  }
]

const router = new VueRouter({
  routes
})
//挂载路由导航守卫,实现页面访问权限
router.beforeEach((to,from,next)=>{
  //to将要访问的路径
  //from代表从那个路径跳转而来
  //next是一个函数，表示放行
  if(to.path === '/login') return next();
  //获取token
 const tokenStr =  window.sessionStorage.getItem('token')
 if(!tokenStr) return next('/login')
 next()
})
export default router
